Cosmic filaments of the cold Big Bang heated by the Herbig Haro black holes before star formation.

 What is called: "Dwarf galaxies" (warm yellow spots)  should be part of the exploded string big bang Black Hole, forming equal sized BH Herbig Haro systems with star formation in between.

see below Figure 4: cosmological simulation of a filament made up of hundreds of thousands of small galaxies. The image on the left shows the emissions produced by all the galaxies as it might be observed in situ. The image on the right shows the filament as it would be seen by MUSE. Even with a very long exposure time, the vast majority of the galaxies cannot be detected individually. However, the light from all these small galaxies is detected as a diffuse background, rather like the Milky 
Way when seen with the naked eye.
© Thibault Garel and Roland Bacon
see: https://www.cnrs.fr/en/first-images-cosmic-web-reveal-myriad-unsuspected-dwarf-galaxies

An other evidence for dual Herbig Haro black hole formation in the early universe.  credit:  Alejandro Benitez Liambay, ( Durham university)

see: https://archaeologynewsnetwork.blogspot.com/2013/02/where-are-all-dwarf-galaxies.html

Vacuum photon trajectories around a black hole, with Penrose trapped surface or vacuum collision horizon.